I just updated my ubuntu 12.10 netbook using the command sudo apt-get dist-upgrade.
The last partial-upgrade has eliminated unity; if I try ro re-install Unity from Synaptic it tell me that I have problem with the dependecies in particular with "compiz-core-abiversion-20120920".
I dont't really know what I have to do to re-install Unity.
Does anybody could help me?
Thanks a lot

[update]
1) I tried to remove "compiz-core-abiversion-20120920" but I can't remove virtual packages
2) after install and re-install compiz it's always the same
3) I don't know what i must to do...